40220768 has 72 divisors (see below), whose sum is σ = 93337272. Its totient is φ = 17009664.

The previous prime is 40220753. The next prime is 40220771. The reversal of 40220768 is 86702204.

It is a self number, because there is not a number n which added to its sum of digits gives 40220768.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177071 + ... + 177297.

It is an arithmetic number, because the mean of its divisors is an integer number (1296351).

Almost surely, 2^40220768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40220768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46668636).

40220768 is an abundant number, since it is smaller than the sum of its proper divisors (53116504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40220768 is a wasteful number, since it uses less digits than its factorization.

40220768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 40220768 is about 6341.9845474425. The cubic root of 40220768 is about 342.6232152979.

The spelling of 40220768 in words is "forty million, two hundred twenty thousand, seven hundred sixty-eight".